Discover new knowledge and insights with IDNLearn.com's extensive Q&A database. Discover detailed and accurate answers to your questions from our knowledgeable and dedicated community members.
Answer:
15. x<-2 or x>1
16. -5<=x<=-1
17. -0.5<=x<0.25
18. x<=-1.2 or x>=-0.4
Step-by-step explanation: